1- Introduction .

2- advantages and dis advantages .

3- Basic Principles of wind energy conversion .

4- emprical formula for wind power conversion .

5- Basic components of wind energy conversion ( WECs ) systems in black diagram .

6- physical bodiment of wind electric generating station in general listed form .

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1- Introduction :

- It's conversion of K.E of the wind into mechanical energy that can be utilized to perform useful work to generate electricity .

- winds arise from temperature difference of the earth's surface resulting from an equal absorption of solar energy .

- air heating by contact with warmer surface tends to rise and cooler air from less heated surface flows to take this place , the resulting air flow constitute wind .

- wind energy is thus a form of solar energy .

2- advantages and disadvantages :-

** advantages of wind energy :-

- it's renewable source energy .

- wind energy is non polluted .

- wind energy avoid fuel provision and transport .

- at small scale up to few kilo watt , it's less in cost .

** disadvantages :-
- wind energy is Fluctuating متذبذبة أو متغيرة

- wind energy needs storage batteries .

- wind energy systems are noisy .

- wind energy systems are relatively high in weight .

- large areas are needed .

- the maintenance is high .

- Q. write down the advantages and dis advantages of wind energy ?

3- Basic principles of wind energy conversion :-

kinetic energy = 1/2 mv²

K.E = 1/2 ρ * volume * v²
power =  1/2 ρ * v * v² * A
power =  1/2 ρ A v³  
V  is the speed of wind in m/sec
ρ  is the density of air ( 1,5 kg/m³ )

4- emperical formula :-

P = 0.37 ( v/10 )³  kw/m²